Fabian Hueske created FLINK-3941:
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Summary: Add support for UNION (with duplicate elimination)
Key: FLINK-3941
URL: https://issues.apache.org/jira/browse/FLINK-3941
Project: Flink
Issue Type: New Feature
Components: Table API
Affects Versions: 1.1.0
Reporter: Fabian Hueske
Priority: Minor
Currently, only UNION ALL is supported by Table API and SQL.
UNION (with duplicate elimination) can be supported by applying a
{{DataSet.distinct()}} after the union on all fields. This issue includes:
- Extending {{DataSetUnion}}
- Relaxing {{DataSetUnionRule}} to translated non-all unions.
- Extend the Table API with union() method.
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